Run each test using a temporary directory (#217)

bin/run_test.py

@@ -3,27 +3,13 @@
 from __future__ import print_function
 import os, sys, subprocess, shutil
 
-project_root = os.path.dirname(os.path.dirname(__file__))
-test_utils_dir = os.path.join(project_root, 'test', 'shared')
 
 def single_run(test_project):
-    # set up an environment that gives access to the test utils
-    env = os.environ.copy()
-
-    if 'PYTHONPATH' in env:
-        env['PYTHONPATH'] += os.pathsep + test_utils_dir
-    else:
-        env['PYTHONPATH'] = test_utils_dir
-
     # run the test
     subprocess.check_call(
         [sys.executable, '-m', 'pytest', '-vv', os.path.join(test_project, 'cibuildwheel_test.py')],
-        env=env,
     )
 
-    # clean up
-    if os.path.exists('wheelhouse'):
-        shutil.rmtree('wheelhouse')
 
 if __name__ == '__main__':
     import argparse
@@ -33,7 +19,7 @@ if __name__ == '__main__':
     args = parser.parse_args()
 
     project_path = os.path.abspath(args.test_project_dir)
-    
+
     if not os.path.exists(project_path):
         print('No test project not found.', file=sys.stderr)
         exit(2)